什么是裹背條(tiao)，裹背條(tiao)是通過皮殼機等機械用于精裝(zhuang)書(shu)(shu)(shu)(shu)本(ben)(ben)的書(shu)(shu)(shu)(shu)脊部分，使(shi)書(shu)(shu)(shu)(shu)貼連接得更加牢固。書(shu)(shu)(shu)(shu)脊制作弧長(chang)的計算(suan)，本(ben)(ben)器規格依書(shu)(shu)(shu)(shu)芯(xin)幅面大小(xiao)進行調定，以能將書(shu)(shu)(shu)(shu)芯(xin)平(ping)穩地送進夾(jia)書(shu)(shu)(shu)(shu)裝(zhuang)置(zhi)內為標準。入本(ben)(ben)后的書(shu)(shu)(shu)(shu)冊(ce)不斜歪，四角垂直地頂(ding)齊在(zai)夾(jia)書(shu)(shu)(shu)(shu)裝(zhuang)置(zhi)的靠(kao)板、側(ce)規內。裁切尺寸正確一致，其質量(liang)要求與(yu)規格誤(wu)差與(yu)一般(ban)切書(shu)(shu)(shu)(shu)相同。

夾(jia)書(shu)簽絲(si)帶裝置安放在切(qie)(qie)書(shu)機與扒圓起脊機之(zhi)間(jian)。即將切(qie)(qie)完的(de)書(shu)芯(xin)，用分本器從中間(jian)分開，再由(you)輸(shu)放絲(si)帶器將絲(si)帶夾(jia)入中心紙(zhi)書(shu)芯(xin)的(de)中間(jian)靠訂縫一邊(bian)。絲(si)帶夾(jia)在書(shu)芯(xin)內(nei)兩端各留出粘邊(bian)和(he)使(shi)用的(de)余地(di)，再經切(qie)(qie)刀（剪刀式）將其剪斷。

剪斷后(hou)的(de)絲(si)(si)帶(dai)，裹背(bei)條(tiao)芯部分被下面膠(jiao)輥(gun)著膠(jiao)、壓實完成(cheng)夾(jia)書(shu)(shu)(shu)(shu)簽(qian)絲(si)(si)帶(dai)過程(cheng)。書(shu)(shu)(shu)(shu)簽(qian)絲(si)(si)帶(dai)的(de)長(chang)度與一般手工(gong)加(jia)(jia)工(gong)長(chang)度基本相同，可依(yi)書(shu)(shu)(shu)(shu)冊幅面長(chang)度調定。扒(ba)(ba)(ba)圓(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)操作及要求。書(shu)(shu)(shu)(shu)芯經裁切、夾(jia)粘絲(si)(si)帶(dai)（或不(bu)夾(jia)粘絲(si)(si)帶(dai)）后(hou)，繼續(xu)傳送（或翻(fan)轉(zhuan)變(bian)(bian)位）并做90°翻(fan)轉(zhuan)，使平放書(shu)(shu)(shu)(shu)芯變(bian)(bian)為后(hou)背(bei)朝上(shang)（或朝下）而進入扒(ba)(ba)(ba)圓(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機(ji)的(de)加(jia)(jia)工(gong)，其操作分為兩步(bu)，但機(ji)器的(de)結構是連在一起(qi)的(de)，均是先扒(ba)(ba)(ba)圓(yuan)(yuan)后(hou)起(qi)脊(ji)(ji)(ji)(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)。扒(ba)(ba)(ba)圓(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機(ji)在扒(ba)(ba)(ba)圓(yuan)(yuan)時，由一組（或一對）圓(yuan)(yuan)輥(gun)，將書(shu)(shu)(shu)(shu)芯壓緊(jin)后(hou)作相對旋轉(zhuan)動(dong)作），使書(shu)(shu)(shu)(shu)背(bei)扒(ba)(ba)(ba)成(cheng)適當規格圓(yuan)(yuan)勢，加(jia)(jia)工(gong)成(cheng)圓(yuan)(yuan)背(bei)書(shu)(shu)(shu)(shu)芯。書(shu)(shu)(shu)(shu)芯書(shu)(shu)(shu)(shu)背(bei)的(de)形狀分為圓(yuan)(yuan)背(bei)有脊(ji)(ji)(ji)(ji)、圓(yuan)(yuan)背(bei)無脊(ji)(ji)(ji)(ji)和(he)(he)方背(bei)（或稱(cheng)平背(bei)）三(san)種。平裝裹背(bei)條(tiao)書(shu)(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)不(bu)高(gao)出(chu)書(shu)(shu)(shu)(shu)芯平面，而精(jing)裝書(shu)(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)一般要高(gao)出(chu)書(shu)(shu)(shu)(shu)芯的(de)平面。書(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)分為真脊(ji)(ji)(ji)(ji)和(he)(he)假脊(ji)(ji)(ji)(ji)。

真脊(ji)是利用書(shu)(shu)(shu)(shu)背(bei)(bei)上下兩邊變形(xing)的(de)弧度(du)高出(chu)書(shu)(shu)(shu)(shu)芯(xin)平(ping)(ping)面；假(jia)脊(ji)則是利用紙板鑲(xiang)在(zai)書(shu)(shu)(shu)(shu)背(bei)(bei)后(hou)形(xing)成的(de)書(shu)(shu)(shu)(shu)脊(ji)，書(shu)(shu)(shu)(shu)脊(ji)的(de)脊(ji)高等于封面紙板的(de)厚度(du)。方(fang)背(bei)(bei)書(shu)(shu)(shu)(shu)芯(xin)。是指(zhi)書(shu)(shu)(shu)(shu)芯(xin)的(de)書(shu)(shu)(shu)(shu)背(bei)(bei)平(ping)(ping)直(zhi)方(fang)正。書(shu)(shu)(shu)(shu)背(bei)(bei)不突出(chu)，與平(ping)(ping)裝書(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)背(bei)(bei)基(ji)本相似。

背(bei)(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)上下環襯互成直角，由于(yu)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)是用(yong)鎖線(xian)訂(ding)訂(ding)連，每一(yi)(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)的訂(ding)口折縫(feng)里面(mian)都用(yong)線(xian)串過，因(yin)此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)(bei)脊(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)其它(ta)部(bu)分(fen)要(yao)厚(hou)(hou)一(yi)(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的帖(tie)(tie)數越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)背(bei)(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)其它(ta)部(bu)分(fen)厚(hou)(hou)度(du)的差(cha)別也越大。所以方(fang)背(bei)(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的形式(shi)一(yi)(yi)般只用(yong)于(yu)厚(hou)(hou)度(du)約為20mm的精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)真脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)高(gao)起有(you)(you)(you)脊(ji)(ji)(ji)壟，堅(jian)硬挺(ting)實，這種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)的形式(shi)適合于(yu)裝(zhuang)訂(ding)較厚(hou)(hou)的書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)(ke)后有(you)(you)(you)明顯的書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽(cao)，翻閱方(fang)便。目前我國的精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多(duo)采用(yong)這種圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)的加工(gong)形式(shi)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)無(wu)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)無(wu)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)假脊(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的厚(hou)(hou)度(du)相同，堅(jian)實挺(ting)括(kuo)，但沒(mei)有(you)(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹(guo)背(bei)(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)(ji)。這種形式(shi)的書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)，一(yi)(yi)般常(chang)與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)(ke)或(huo)塑料壓制而成的書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)(ke)相配套。中心紙有(you)(you)(you)些機器還沒(mei)有(you)(you)(you)沖(chong)圓(yuan)(yuan)(yuan)裝(zhuang)置(zhi)，即將方(fang)背(bei)(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進行沖(chong)圓(yuan)(yuan)(yuan)加工(gong)，作初步定型。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)厚(hou)(hou)度(du)和中心紙幅面(mian)大小調(diao)定好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及扒圓(yuan)(yuan)(yuan)輥(gun)（或(huo)沖(chong)圓(yuan)(yuan)(yuan)裝(zhuang)置(zhi)）的規矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)進入(ru)夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并送到扒圓(yuan)(yuan)(yuan)輥(gun)之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)扒擠成一(yi)(yi)定圓(yuan)(yuan)(yuan)勢(shi)。