什么是裹背條(tiao)(tiao)，裹背條(tiao)(tiao)是通過(guo)皮殼(ke)機(ji)(ji)等機(ji)(ji)械用于精裝(zhuang)書(shu)(shu)本(ben)的(de)書(shu)(shu)脊部分，使(shi)書(shu)(shu)貼(tie)連接得(de)更加牢固。書(shu)(shu)脊制作(zuo)弧長的(de)計算，本(ben)器規格(ge)依書(shu)(shu)芯幅面大小(xiao)進行調定，以(yi)能將書(shu)(shu)芯平穩(wen)地送進夾(jia)書(shu)(shu)裝(zhuang)置內為標準。入本(ben)后的(de)書(shu)(shu)冊不斜歪，四角(jiao)垂直地頂齊在(zai)夾(jia)書(shu)(shu)裝(zhuang)置的(de)靠板、側規內。裁切尺寸(cun)正確一(yi)(yi)致，其(qi)質(zhi)量要求與規格(ge)誤差與一(yi)(yi)般切書(shu)(shu)相同。

夾(jia)書(shu)(shu)(shu)簽絲帶(dai)裝置安放(fang)在切書(shu)(shu)(shu)機與(yu)扒圓(yuan)起脊(ji)機之(zhi)間(jian)。即將切完的書(shu)(shu)(shu)芯，用(yong)分本器從中(zhong)間(jian)分開，再由輸放(fang)絲帶(dai)器將絲帶(dai)夾(jia)入中(zhong)心紙書(shu)(shu)(shu)芯的中(zhong)間(jian)靠訂縫一邊。絲帶(dai)夾(jia)在書(shu)(shu)(shu)芯內兩端各留出粘邊和使用(yong)的余地，再經切刀(dao)(dao)（剪刀(dao)(dao)式(shi)）將其剪斷。

剪斷后(hou)(hou)(hou)的絲(si)帶，裹(guo)(guo)背(bei)(bei)條芯(xin)(xin)(xin)(xin)(xin)部分被下面膠(jiao)輥(gun)著膠(jiao)、壓(ya)實完成(cheng)夾(jia)書(shu)(shu)(shu)簽(qian)絲(si)帶過(guo)程。書(shu)(shu)(shu)簽(qian)絲(si)帶的長度(du)與一般(ban)手工(gong)加(jia)工(gong)長度(du)基本(ben)相同(tong)，可(ke)依書(shu)(shu)(shu)冊(ce)幅面長度(du)調定(ding)。扒(ba)(ba)(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)操作(zuo)及要(yao)求。書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)經(jing)裁切、夾(jia)粘絲(si)帶（或不(bu)夾(jia)粘絲(si)帶）后(hou)(hou)(hou)，繼續(xu)傳送（或翻轉變位）并(bing)做90°翻轉，使(shi)平放書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)變為(wei)(wei)后(hou)(hou)(hou)背(bei)(bei)朝上（或朝下）而(er)進(jin)入(ru)扒(ba)(ba)(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)機(ji)。扒(ba)(ba)(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)機(ji)的加(jia)工(gong)，其操作(zuo)分為(wei)(wei)兩步，但機(ji)器的結構是(shi)連在(zai)(zai)一起(qi)(qi)的，均是(shi)先扒(ba)(ba)(ba)圓(yuan)后(hou)(hou)(hou)起(qi)(qi)脊(ji)(ji)(ji)(ji)。扒(ba)(ba)(ba)圓(yuan)。扒(ba)(ba)(ba)圓(yuan)起(qi)(qi)脊(ji)(ji)(ji)(ji)機(ji)在(zai)(zai)扒(ba)(ba)(ba)圓(yuan)時，由一組(zu)（或一對(dui)）圓(yuan)輥(gun)，將書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)壓(ya)緊后(hou)(hou)(hou)作(zuo)相對(dui)旋(xuan)轉動作(zuo)），使(shi)書(shu)(shu)(shu)背(bei)(bei)扒(ba)(ba)(ba)成(cheng)適當規格圓(yuan)勢，加(jia)工(gong)成(cheng)圓(yuan)背(bei)(bei)書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)書(shu)(shu)(shu)背(bei)(bei)的形狀分為(wei)(wei)圓(yuan)背(bei)(bei)有(you)脊(ji)(ji)(ji)(ji)、圓(yuan)背(bei)(bei)無脊(ji)(ji)(ji)(ji)和方背(bei)(bei)（或稱平背(bei)(bei)）三(san)種(zhong)。平裝裹(guo)(guo)背(bei)(bei)條書(shu)(shu)(shu)刊的書(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)不(bu)高(gao)出書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)平面，而(er)精(jing)裝書(shu)(shu)(shu)刊的書(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)一般(ban)要(yao)高(gao)出書(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的平面。書(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)分為(wei)(wei)真脊(ji)(ji)(ji)(ji)和假(jia)脊(ji)(ji)(ji)(ji)。

真脊(ji)是利(li)用書(shu)(shu)背(bei)(bei)上下兩(liang)邊(bian)變(bian)形的弧度高出書(shu)(shu)芯平(ping)面；假脊(ji)則是利(li)用紙(zhi)(zhi)板(ban)(ban)鑲(xiang)在書(shu)(shu)背(bei)(bei)后形成的書(shu)(shu)脊(ji)，書(shu)(shu)脊(ji)的脊(ji)高等于封面紙(zhi)(zhi)板(ban)(ban)的厚度。方背(bei)(bei)書(shu)(shu)芯。是指(zhi)書(shu)(shu)芯的書(shu)(shu)背(bei)(bei)平(ping)直方正。書(shu)(shu)背(bei)(bei)不突(tu)出，與平(ping)裝書(shu)(shu)刊的書(shu)(shu)背(bei)(bei)基本相(xiang)似。

背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)上下環襯互成直角，由于精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)是(shi)用(yong)(yong)鎖線訂(ding)訂(ding)連，每(mei)一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)訂(ding)口折縫(feng)里面都用(yong)(yong)線串過，因(yin)此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)脊(ji)(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其它部分要厚(hou)一(yi)些(xie)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)帖(tie)數越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)其它部分厚(hou)度的(de)(de)差別(bie)也越大。所以方背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)形(xing)式(shi)(shi)一(yi)般只用(yong)(yong)于厚(hou)度約(yue)為20mm的(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)背(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)(ji)又稱圓(yuan)(yuan)背(bei)(bei)(bei)真脊(ji)(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)部呈圓(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)高(gao)起有(you)(you)脊(ji)(ji)(ji)(ji)壟，堅硬挺(ting)(ting)實，這種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)(de)形(xing)式(shi)(shi)適(shi)合于裝(zhuang)(zhuang)(zhuang)訂(ding)較(jiao)厚(hou)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)(zhuang)(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)(you)明顯的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱(yue)方便。目前(qian)我國(guo)的(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用(yong)(yong)這種圓(yuan)(yuan)背(bei)(bei)(bei)有(you)(you)脊(ji)(ji)(ji)(ji)的(de)(de)加工形(xing)式(shi)(shi)。圓(yuan)(yuan)背(bei)(bei)(bei)無(wu)(wu)脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)(bei)(bei)無(wu)(wu)脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)又稱圓(yuan)(yuan)背(bei)(bei)(bei)假脊(ji)(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)部呈圓(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)厚(hou)度相(xiang)同，堅實挺(ting)(ting)括，但沒有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)條脊(ji)(ji)(ji)(ji)。這種形(xing)式(shi)(shi)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)，一(yi)般常與(yu)軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑(su)料壓制而成的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相(xiang)配套。中心紙有(you)(you)些(xie)機器(qi)還沒有(you)(you)沖(chong)圓(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置，即將方背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進(jin)行沖(chong)圓(yuan)(yuan)加工，作初(chu)步(bu)定(ding)(ding)型(xing)。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)厚(hou)度和(he)中心紙幅面大小(xiao)調定(ding)(ding)好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及扒圓(yuan)(yuan)輥（或沖(chong)圓(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置）的(de)(de)規矩(ju)，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)進(jin)入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)內并送(song)到(dao)扒圓(yuan)(yuan)輥之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒擠成一(yi)定(ding)(ding)圓(yuan)(yuan)勢。