什(shen)么是裹背條，裹背條是通過皮殼機等機械(xie)用(yong)于精裝(zhuang)書(shu)(shu)(shu)本(ben)(ben)的(de)書(shu)(shu)(shu)脊部分，使書(shu)(shu)(shu)貼連接(jie)得更加牢固。書(shu)(shu)(shu)脊制作弧長(chang)的(de)計(ji)算，本(ben)(ben)器規(gui)格(ge)依(yi)書(shu)(shu)(shu)芯幅面(mian)大小進行調定，以能(neng)將書(shu)(shu)(shu)芯平穩地(di)送進夾書(shu)(shu)(shu)裝(zhuang)置內為標準。入本(ben)(ben)后的(de)書(shu)(shu)(shu)冊不斜(xie)歪，四角垂(chui)直地(di)頂齊在夾書(shu)(shu)(shu)裝(zhuang)置的(de)靠板、側規(gui)內。裁切(qie)尺寸正確一(yi)致，其質量要求(qiu)與(yu)規(gui)格(ge)誤(wu)差與(yu)一(yi)般切(qie)書(shu)(shu)(shu)相同。

夾(jia)書(shu)簽絲(si)帶裝置安放在切書(shu)機與扒圓起脊機之間(jian)。即(ji)將(jiang)切完的(de)書(shu)芯，用(yong)分本(ben)器從中(zhong)(zhong)間(jian)分開(kai)，再(zai)由輸放絲(si)帶器將(jiang)絲(si)帶夾(jia)入中(zhong)(zhong)心紙(zhi)書(shu)芯的(de)中(zhong)(zhong)間(jian)靠訂縫一邊(bian)。絲(si)帶夾(jia)在書(shu)芯內(nei)兩端各留出粘(zhan)邊(bian)和使用(yong)的(de)余地，再(zai)經切刀（剪(jian)刀式）將(jiang)其剪(jian)斷。

剪斷(duan)后的(de)絲帶(dai)，裹背(bei)(bei)條芯(xin)(xin)(xin)(xin)部(bu)分(fen)被(bei)下(xia)面膠輥著(zhu)膠、壓實完成(cheng)夾(jia)(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽(qian)絲帶(dai)過程(cheng)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽(qian)絲帶(dai)的(de)長(chang)度與一(yi)(yi)般手工(gong)加工(gong)長(chang)度基本相同，可依書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)冊幅面長(chang)度調(diao)定。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)操(cao)(cao)作及要求。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)經裁切(qie)、夾(jia)(jia)粘(zhan)絲帶(dai)（或(huo)(huo)不夾(jia)(jia)粘(zhan)絲帶(dai)）后，繼續傳送(song)（或(huo)(huo)翻轉變位(wei)）并(bing)做90°翻轉，使平(ping)放書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)變為(wei)后背(bei)(bei)朝上（或(huo)(huo)朝下(xia)）而(er)進(jin)入扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)機。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)機的(de)加工(gong)，其操(cao)(cao)作分(fen)為(wei)兩(liang)步，但(dan)機器的(de)結(jie)構是(shi)(shi)連在一(yi)(yi)起(qi)(qi)的(de)，均是(shi)(shi)先扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)后起(qi)(qi)脊(ji)(ji)。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)(ji)機在扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)時，由一(yi)(yi)組（或(huo)(huo)一(yi)(yi)對）圓(yuan)(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)壓緊后作相對旋轉動(dong)作），使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)扒(ba)(ba)成(cheng)適當(dang)規格圓(yuan)(yuan)(yuan)(yuan)勢，加工(gong)成(cheng)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)的(de)形狀分(fen)為(wei)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)有脊(ji)(ji)、圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)無(wu)脊(ji)(ji)和方背(bei)(bei)（或(huo)(huo)稱平(ping)背(bei)(bei)）三種。平(ping)裝(zhuang)裹背(bei)(bei)條書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)不高(gao)出書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)平(ping)面，而(er)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)一(yi)(yi)般要高(gao)出書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)平(ping)面。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)分(fen)為(wei)真脊(ji)(ji)和假脊(ji)(ji)。

真脊(ji)是利(li)用書背上下兩邊變(bian)形(xing)的弧度(du)高(gao)出書芯平面；假脊(ji)則是利(li)用紙板鑲在書背后形(xing)成的書脊(ji)，書脊(ji)的脊(ji)高(gao)等于(yu)封面紙板的厚度(du)。方背書芯。是指書芯的書背平直方正。書背不突出，與平裝書刊的書背基本相似。

背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)上下環襯互(hu)成直(zhi)角(jiao)，由(you)于精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)是用(yong)鎖線訂(ding)訂(ding)連(lian)，每一個(ge)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)(de)訂(ding)口折縫里面都用(yong)線串過，因(yin)此，書(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)比(bi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其它部(bu)(bu)分(fen)要厚(hou)一些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)(de)(de)帖(tie)數越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)其它部(bu)(bu)分(fen)厚(hou)度(du)的(de)(de)(de)(de)差別(bie)也越大(da)。所以方背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)(de)(de)形(xing)式(shi)一般只用(yong)于厚(hou)度(du)約為20mm的(de)(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)脊(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)脊(ji)(ji)(ji)(ji)(ji)又稱(cheng)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)真脊(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部(bu)(bu)呈圓(yuan)(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)高起(qi)有(you)脊(ji)(ji)(ji)(ji)(ji)壟，堅(jian)硬挺實，這種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)的(de)(de)(de)(de)形(xing)式(shi)適合(he)于裝(zhuang)訂(ding)較(jiao)厚(hou)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)明顯的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方便(bian)。目前我國(guo)的(de)(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用(yong)這種(zhong)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)脊(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)(de)加工(gong)形(xing)式(shi)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)又稱(cheng)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)假脊(ji)(ji)(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部(bu)(bu)呈圓(yuan)(yuan)(yuan)弧形(xing)，書(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)芯(xin)(xin)(xin)(xin)的(de)(de)(de)(de)厚(hou)度(du)相同(tong)，堅(jian)實挺括，但沒有(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)(ji)(ji)(ji)。這種(zhong)形(xing)式(shi)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)，一般常(chang)與軟(ruan)質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑料壓制而成的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相配套。中(zhong)心(xin)紙(zhi)(zhi)有(you)些機器(qi)還沒有(you)沖圓(yuan)(yuan)(yuan)裝(zhuang)置，即將方背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進行沖圓(yuan)(yuan)(yuan)加工(gong)，作初(chu)步(bu)定型。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)厚(hou)度(du)和中(zhong)心(xin)紙(zhi)(zhi)幅面大(da)小調定好夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及(ji)扒(ba)(ba)圓(yuan)(yuan)(yuan)輥（或沖圓(yuan)(yuan)(yuan)裝(zhuang)置）的(de)(de)(de)(de)規矩，再使書(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)器(qi)內(nei)并送到扒(ba)(ba)圓(yuan)(yuan)(yuan)輥之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)扒(ba)(ba)擠成一定圓(yuan)(yuan)(yuan)勢。