什么是(shi)裹背(bei)條(tiao)，裹背(bei)條(tiao)是(shi)通過皮殼機(ji)等機(ji)械用于(yu)精裝書(shu)(shu)本(ben)(ben)的書(shu)(shu)脊部(bu)分，使書(shu)(shu)貼連接得更加牢固。書(shu)(shu)脊制作弧長的計(ji)算，本(ben)(ben)器規(gui)格(ge)依書(shu)(shu)芯幅面大(da)小進行調定，以能將(jiang)書(shu)(shu)芯平穩地(di)送進夾(jia)書(shu)(shu)裝置內為標準。入本(ben)(ben)后的書(shu)(shu)冊不斜歪(wai)，四角垂直地(di)頂(ding)齊(qi)在(zai)夾(jia)書(shu)(shu)裝置的靠(kao)板、側規(gui)內。裁切尺寸正確一致，其質(zhi)量要求與(yu)規(gui)格(ge)誤差(cha)與(yu)一般切書(shu)(shu)相同。

夾書(shu)簽絲帶裝置安放在切(qie)書(shu)機與扒(ba)圓起(qi)脊機之間。即(ji)將(jiang)切(qie)完的(de)書(shu)芯，用分(fen)本器從中(zhong)間分(fen)開，再(zai)由輸(shu)放絲帶器將(jiang)絲帶夾入(ru)中(zhong)心紙書(shu)芯的(de)中(zhong)間靠訂縫一邊(bian)。絲帶夾在書(shu)芯內(nei)兩端各留出(chu)粘邊(bian)和使用的(de)余地，再(zai)經切(qie)刀(dao)(dao)（剪(jian)刀(dao)(dao)式）將(jiang)其剪(jian)斷。

剪斷后的(de)(de)絲帶(dai)，裹背(bei)(bei)條芯(xin)部(bu)分(fen)被(bei)下(xia)面膠輥著(zhu)膠、壓實(shi)完成夾(jia)書(shu)(shu)(shu)(shu)簽絲帶(dai)過程。書(shu)(shu)(shu)(shu)簽絲帶(dai)的(de)(de)長度(du)與一(yi)般手工(gong)加工(gong)長度(du)基(ji)本(ben)相(xiang)同(tong)，可(ke)依書(shu)(shu)(shu)(shu)冊幅面長度(du)調(diao)定。扒(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)(qi)脊(ji)(ji)(ji)操(cao)(cao)作(zuo)及要求。書(shu)(shu)(shu)(shu)芯(xin)經裁切、夾(jia)粘絲帶(dai)（或(huo)不(bu)夾(jia)粘絲帶(dai)）后，繼續傳(chuan)送（或(huo)翻轉變(bian)位(wei)）并做90°翻轉，使平(ping)(ping)放書(shu)(shu)(shu)(shu)芯(xin)變(bian)為后背(bei)(bei)朝上（或(huo)朝下(xia)）而進入扒(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)(qi)脊(ji)(ji)(ji)機。扒(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)(qi)脊(ji)(ji)(ji)機的(de)(de)加工(gong)，其操(cao)(cao)作(zuo)分(fen)為兩步，但機器的(de)(de)結構(gou)是連在一(yi)起(qi)(qi)(qi)的(de)(de)，均是先(xian)扒(ba)(ba)圓(yuan)(yuan)(yuan)后起(qi)(qi)(qi)脊(ji)(ji)(ji)。扒(ba)(ba)圓(yuan)(yuan)(yuan)。扒(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)(qi)(qi)脊(ji)(ji)(ji)機在扒(ba)(ba)圓(yuan)(yuan)(yuan)時，由(you)一(yi)組(zu)（或(huo)一(yi)對）圓(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)芯(xin)壓緊后作(zuo)相(xiang)對旋轉動作(zuo)），使書(shu)(shu)(shu)(shu)背(bei)(bei)扒(ba)(ba)成適(shi)當規格圓(yuan)(yuan)(yuan)勢(shi)，加工(gong)成圓(yuan)(yuan)(yuan)背(bei)(bei)書(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)(shu)背(bei)(bei)的(de)(de)形狀分(fen)為圓(yuan)(yuan)(yuan)背(bei)(bei)有脊(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)無脊(ji)(ji)(ji)和方背(bei)(bei)（或(huo)稱平(ping)(ping)背(bei)(bei)）三(san)種(zhong)。平(ping)(ping)裝裹背(bei)(bei)條書(shu)(shu)(shu)(shu)刊的(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)不(bu)高出(chu)書(shu)(shu)(shu)(shu)芯(xin)平(ping)(ping)面，而精裝書(shu)(shu)(shu)(shu)刊的(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)一(yi)般要高出(chu)書(shu)(shu)(shu)(shu)芯(xin)的(de)(de)平(ping)(ping)面。書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)分(fen)為真脊(ji)(ji)(ji)和假脊(ji)(ji)(ji)。

真(zhen)脊(ji)是利(li)用書(shu)背(bei)(bei)上下兩邊變(bian)形(xing)的弧度(du)高出書(shu)芯平(ping)面；假脊(ji)則是利(li)用紙板鑲在書(shu)背(bei)(bei)后形(xing)成的書(shu)脊(ji)，書(shu)脊(ji)的脊(ji)高等于封面紙板的厚度(du)。方(fang)背(bei)(bei)書(shu)芯。是指書(shu)芯的書(shu)背(bei)(bei)平(ping)直方(fang)正。書(shu)背(bei)(bei)不突出，與平(ping)裝書(shu)刊(kan)的書(shu)背(bei)(bei)基本(ben)相(xiang)似(si)。

背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)上下(xia)環襯(chen)互成(cheng)直(zhi)角，由(you)于(yu)精裝(zhuang)(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)是用鎖線訂(ding)訂(ding)連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖的(de)(de)(de)(de)訂(ding)口折縫(feng)里面都(dou)用線串過(guo)，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)脊(ji)(ji)(ji)(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖其它(ta)部分(fen)要厚(hou)(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍的(de)(de)(de)(de)帖數越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)(ji)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)其它(ta)部分(fen)厚(hou)(hou)度(du)(du)的(de)(de)(de)(de)差別也越大(da)。所以方(fang)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)(de)(de)形(xing)(xing)式(shi)(shi)一(yi)般只用于(yu)厚(hou)(hou)度(du)(du)約為20mm的(de)(de)(de)(de)精裝(zhuang)(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)(ji)(ji)(ji)又稱(cheng)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)真脊(ji)(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)(ji)高起有(you)(you)(you)脊(ji)(ji)(ji)(ji)(ji)(ji)壟，堅(jian)硬挺(ting)實，這種(zhong)(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)的(de)(de)(de)(de)形(xing)(xing)式(shi)(shi)適合于(yu)裝(zhuang)(zhuang)(zhuang)(zhuang)訂(ding)較厚(hou)(hou)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍，裝(zhuang)(zhuang)(zhuang)(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)(you)(you)明顯的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻(fan)閱方(fang)便。目前(qian)我國的(de)(de)(de)(de)精裝(zhuang)(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍多(duo)采(cai)用這種(zhong)(zhong)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)(de)加(jia)工形(xing)(xing)式(shi)(shi)。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)又稱(cheng)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)假脊(ji)(ji)(ji)(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)(de)(de)厚(hou)(hou)度(du)(du)相(xiang)同(tong)，堅(jian)實挺(ting)括，但沒有(you)(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)(ji)(ji)(ji)(ji)。這種(zhong)(zhong)形(xing)(xing)式(shi)(shi)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)，一(yi)般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑(su)料壓制(zhi)而成(cheng)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相(xiang)配套(tao)。中心紙有(you)(you)(you)些機器(qi)還沒有(you)(you)(you)沖圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)(zhuang)置，即將方(fang)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進行沖圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)加(jia)工，作初步(bu)定(ding)(ding)型。先(xian)根據(ju)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)厚(hou)(hou)度(du)(du)和(he)中心紙幅(fu)面大(da)小(xiao)調定(ding)(ding)好夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及(ji)扒圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)（或沖圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)(zhuang)置）的(de)(de)(de)(de)規(gui)矩，再使(shi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)進入夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)內(nei)并送(song)到扒圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)之(zhi)間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)扒擠(ji)成(cheng)一(yi)定(ding)(ding)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)勢。